Unveiling Interfacial Effects for Efficient and Stable Hydrogen Evolution Reaction on Ruthenium Nanoparticles-Embedded Pentlandite Composites,Small

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Unveiling Interfacial Effects for Efficient and Stable Hydrogen Evolution Reaction on Ruthenium Nanoparticles-Embedded Pentlandite Composites
Small ( IF 13.0 ) Pub Date : 2023-06-29 , DOI: 10.1002/smll.202301721
Chenxu Zhang ₁ , Yanan Cui ₁ , Chao Jiang ₁ , Yaxin Li ₁ , Zeshuo Meng ₁ , Chong Wang ₁ , Zhengyan Du ₁ , Shansheng Yu ₁ , Hongwei Tian ₁ , Weitao Zheng _{1,

2}

Affiliation

Heterogenous catalysis is important for future clean and sustainable energy systems. However, an urgent need to promote the development of efficient and stable hydrogen evolution catalysts still exists. In this study, ruthenium nanoparticles (Ru NPs) are in situ grown on Fe₅Ni₄S₈ support (Ru/FNS) by replacement growth strategy. An efficient Ru/FNS electrocatalyst with enhanced interfacial effect is then developed and successfully applied for pH-universal hydrogen evolution reaction (HER). The Fe vacancies formed by FNS during the electrochemical process are found to be conducive to the introduction and firm anchoring of Ru atoms. Compared to Pt atoms, Ru atoms get easily aggregated and then grow rapidly to form NPs. This induces more bonding between Ru NPs and FNS, preventing the fall-off of Ru NPs and maintaining the structural stability of FNS. Moreover, the interaction between FNS and Ru NPs can adjust the d-band center of Ru NPs, as well as balance the hydrolytic dissociation energy and hydrogen binding energy. Consequently, the as-prepared Ru/FNS electrocatalyst exhibits excellent HER activity and improved cycle stability under pH-universal conditions. The developed pentlandite-based electrocatalysts with low cost, high activity, and good stability are promising candidates for future applications in water electrolysis.

中文翻译：

揭示钌纳米颗粒嵌入镍黄铁矿复合材料高效稳定析氢反应的界面效应

多相催化对于未来清洁和可持续能源系统非常重要。然而，促进高效稳定析氢催化剂开发的迫切需要仍然存在。_{在这项研究中，钌纳米粒子（Ru NPs）通过替代生长策略在Fe 5} Ni ₄ S ₈载体（Ru/FNS）上原位生长。随后开发出一种具有增强界面效应的高效Ru/FNS电催化剂，并成功应用于pH通用析氢反应（HER）。研究发现FNS在电化学过程中形成的Fe空位有利于Ru原子的引入和牢固锚定。与 Pt 原子相比，Ru 原子更容易聚集，然后快速生长形成纳米颗粒。这会诱导Ru NPs和FNS之间更多的结合，防止Ru NPs脱落并保持FNS的结构稳定性。此外，FNS和Ru NPs之间的相互作用可以调节Ru NPs的d带中心，以及平衡水解离能和氢结合能。因此，所制备的 Ru/FNS 电催化剂在 pH 通用条件下表现出优异的 HER 活性和改善的循环稳定性。所开发的镍黄铁矿基电催化剂具有低成本、高活性和良好的稳定性，是未来在水电解中应用的有希望的候选者。

更新日期：2023-06-29

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